For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningInstallation Procedure
Apply structural adhesive on the flanges of the rear side door inner
panel where the rear side door outer panel bears on.
Align the rear side door outer panel.
Verify the fit of the rear side door outer panel.
Clamp the rear side door outer panel
into position.
Pre-fla ...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in
the Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface
section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer to Bat ...
Metric Fasteners
This vehicle provides fastener dimensions using the metric system. Most
metric fasteners are approximate in diameter to equivalent
English fasteners. Make replacements using fasteners of the same nominal
diameter, thread pitch, and strength.
A number marking identifies the OE metric fastener ...